What is red 40 and what is it made from?

Red 40, also known as Allura Red AC, is a synthetic food dye commonly used to impart a red color to various food products, beverages, and cosmetics. It is derived from petroleum and is one of the most widely used artificial colorants in the United States. Red 40 is approved by the FDA, but some individuals may have allergic reactions or sensitivities to it. Its use has been a topic of debate regarding potential health effects and its impact on behavior in children.